[Intel-gfx] [PATCH 2/3] drm/i915/dsi: Move vlv/icl_dphy_param_init call out of intel_dsi_vbt_init (v2)
Hans de Goede
hdegoede at redhat.com
Sat Jun 8 13:39:56 UTC 2019
Hi all,
On 05-06-19 20:37, Ville Syrjälä wrote:
> On Wed, Jun 05, 2019 at 08:17:34PM +0200, Hans de Goede wrote:
>> The vlv/icl_dphy_param_init calls do various calculations to set dphy
>> parameters based on the pclk.
>>
>> Move the calling of vlv/icl_dphy_param_init to vlv_dsi_init to give
>> vlv_dsi_init a chance to tweak the pclk before these calculations are done.
>>
>> Changes in v2:
>> -Also moves the icl and vlv specific dphy_param_init functions from the
>> generic intel_dsi_vbt.c file into the icl_ and vlv_dsi.c specific files.
>>
>> Note icl_dphy_param_init() and vlv_dphy_param_init() are only moved,
>> otherwise they are completely unchanged.
>>
>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Thanks, I've just pushed this series to dinq (now that the CI is done and
happy with it).
Regards,
Hans
>
>> ---
>> drivers/gpu/drm/i915/icl_dsi.c | 108 ++++++++++
>> drivers/gpu/drm/i915/intel_dsi.h | 1 +
>> drivers/gpu/drm/i915/intel_dsi_vbt.c | 282 +--------------------------
>> drivers/gpu/drm/i915/vlv_dsi.c | 170 ++++++++++++++++
>> 4 files changed, 280 insertions(+), 281 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
>> index 9d962ea1e635..511c76e788ef 100644
>> --- a/drivers/gpu/drm/i915/icl_dsi.c
>> +++ b/drivers/gpu/drm/i915/icl_dsi.c
>> @@ -1363,6 +1363,113 @@ static const struct mipi_dsi_host_ops gen11_dsi_host_ops = {
>> .transfer = gen11_dsi_host_transfer,
>> };
>>
>> +#define ICL_PREPARE_CNT_MAX 0x7
>> +#define ICL_CLK_ZERO_CNT_MAX 0xf
>> +#define ICL_TRAIL_CNT_MAX 0x7
>> +#define ICL_TCLK_PRE_CNT_MAX 0x3
>> +#define ICL_TCLK_POST_CNT_MAX 0x7
>> +#define ICL_HS_ZERO_CNT_MAX 0xf
>> +#define ICL_EXIT_ZERO_CNT_MAX 0x7
>> +
>> +static void icl_dphy_param_init(struct intel_dsi *intel_dsi)
>> +{
>> + struct drm_device *dev = intel_dsi->base.base.dev;
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
>> + u32 tlpx_ns;
>> + u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
>> + u32 ths_prepare_ns, tclk_trail_ns;
>> + u32 hs_zero_cnt;
>> + u32 tclk_pre_cnt, tclk_post_cnt;
>> +
>> + tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
>> +
>> + tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
>> + ths_prepare_ns = max(mipi_config->ths_prepare,
>> + mipi_config->tclk_prepare);
>> +
>> + /*
>> + * prepare cnt in escape clocks
>> + * this field represents a hexadecimal value with a precision
>> + * of 1.2 – i.e. the most significant bit is the integer
>> + * and the least significant 2 bits are fraction bits.
>> + * so, the field can represent a range of 0.25 to 1.75
>> + */
>> + prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * 4, tlpx_ns);
>> + if (prepare_cnt > ICL_PREPARE_CNT_MAX) {
>> + DRM_DEBUG_KMS("prepare_cnt out of range (%d)\n", prepare_cnt);
>> + prepare_cnt = ICL_PREPARE_CNT_MAX;
>> + }
>> +
>> + /* clk zero count in escape clocks */
>> + clk_zero_cnt = DIV_ROUND_UP(mipi_config->tclk_prepare_clkzero -
>> + ths_prepare_ns, tlpx_ns);
>> + if (clk_zero_cnt > ICL_CLK_ZERO_CNT_MAX) {
>> + DRM_DEBUG_KMS("clk_zero_cnt out of range (%d)\n", clk_zero_cnt);
>> + clk_zero_cnt = ICL_CLK_ZERO_CNT_MAX;
>> + }
>> +
>> + /* trail cnt in escape clocks*/
>> + trail_cnt = DIV_ROUND_UP(tclk_trail_ns, tlpx_ns);
>> + if (trail_cnt > ICL_TRAIL_CNT_MAX) {
>> + DRM_DEBUG_KMS("trail_cnt out of range (%d)\n", trail_cnt);
>> + trail_cnt = ICL_TRAIL_CNT_MAX;
>> + }
>> +
>> + /* tclk pre count in escape clocks */
>> + tclk_pre_cnt = DIV_ROUND_UP(mipi_config->tclk_pre, tlpx_ns);
>> + if (tclk_pre_cnt > ICL_TCLK_PRE_CNT_MAX) {
>> + DRM_DEBUG_KMS("tclk_pre_cnt out of range (%d)\n", tclk_pre_cnt);
>> + tclk_pre_cnt = ICL_TCLK_PRE_CNT_MAX;
>> + }
>> +
>> + /* tclk post count in escape clocks */
>> + tclk_post_cnt = DIV_ROUND_UP(mipi_config->tclk_post, tlpx_ns);
>> + if (tclk_post_cnt > ICL_TCLK_POST_CNT_MAX) {
>> + DRM_DEBUG_KMS("tclk_post_cnt out of range (%d)\n", tclk_post_cnt);
>> + tclk_post_cnt = ICL_TCLK_POST_CNT_MAX;
>> + }
>> +
>> + /* hs zero cnt in escape clocks */
>> + hs_zero_cnt = DIV_ROUND_UP(mipi_config->ths_prepare_hszero -
>> + ths_prepare_ns, tlpx_ns);
>> + if (hs_zero_cnt > ICL_HS_ZERO_CNT_MAX) {
>> + DRM_DEBUG_KMS("hs_zero_cnt out of range (%d)\n", hs_zero_cnt);
>> + hs_zero_cnt = ICL_HS_ZERO_CNT_MAX;
>> + }
>> +
>> + /* hs exit zero cnt in escape clocks */
>> + exit_zero_cnt = DIV_ROUND_UP(mipi_config->ths_exit, tlpx_ns);
>> + if (exit_zero_cnt > ICL_EXIT_ZERO_CNT_MAX) {
>> + DRM_DEBUG_KMS("exit_zero_cnt out of range (%d)\n", exit_zero_cnt);
>> + exit_zero_cnt = ICL_EXIT_ZERO_CNT_MAX;
>> + }
>> +
>> + /* clock lane dphy timings */
>> + intel_dsi->dphy_reg = (CLK_PREPARE_OVERRIDE |
>> + CLK_PREPARE(prepare_cnt) |
>> + CLK_ZERO_OVERRIDE |
>> + CLK_ZERO(clk_zero_cnt) |
>> + CLK_PRE_OVERRIDE |
>> + CLK_PRE(tclk_pre_cnt) |
>> + CLK_POST_OVERRIDE |
>> + CLK_POST(tclk_post_cnt) |
>> + CLK_TRAIL_OVERRIDE |
>> + CLK_TRAIL(trail_cnt));
>> +
>> + /* data lanes dphy timings */
>> + intel_dsi->dphy_data_lane_reg = (HS_PREPARE_OVERRIDE |
>> + HS_PREPARE(prepare_cnt) |
>> + HS_ZERO_OVERRIDE |
>> + HS_ZERO(hs_zero_cnt) |
>> + HS_TRAIL_OVERRIDE |
>> + HS_TRAIL(trail_cnt) |
>> + HS_EXIT_OVERRIDE |
>> + HS_EXIT(exit_zero_cnt));
>> +
>> + intel_dsi_log_params(intel_dsi);
>> +}
>> +
>> void icl_dsi_init(struct drm_i915_private *dev_priv)
>> {
>> struct drm_device *dev = &dev_priv->drm;
>> @@ -1455,6 +1562,7 @@ void icl_dsi_init(struct drm_i915_private *dev_priv)
>> goto err;
>> }
>>
>> + icl_dphy_param_init(intel_dsi);
>> return;
>>
>> err:
>> diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
>> index 705a609050c0..2e997187fed5 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi.h
>> +++ b/drivers/gpu/drm/i915/intel_dsi.h
>> @@ -192,5 +192,6 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id);
>> void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
>> enum mipi_seq seq_id);
>> void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec);
>> +void intel_dsi_log_params(struct intel_dsi *intel_dsi);
>>
>> #endif /* _INTEL_DSI_H */
>> diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c b/drivers/gpu/drm/i915/intel_dsi_vbt.c
>> index 3a187ffabfbd..26fcb3344ebb 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi_vbt.c
>> +++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c
>> @@ -41,13 +41,6 @@
>> #define MIPI_VIRTUAL_CHANNEL_SHIFT 1
>> #define MIPI_PORT_SHIFT 3
>>
>> -#define PREPARE_CNT_MAX 0x3F
>> -#define EXIT_ZERO_CNT_MAX 0x3F
>> -#define CLK_ZERO_CNT_MAX 0xFF
>> -#define TRAIL_CNT_MAX 0x1F
>> -
>> -#define NS_KHZ_RATIO 1000000
>> -
>> /* base offsets for gpio pads */
>> #define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130
>> #define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
>> @@ -532,7 +525,7 @@ void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
>> msleep(msec);
>> }
>>
>> -static void intel_dsi_log_params(struct intel_dsi *intel_dsi)
>> +void intel_dsi_log_params(struct intel_dsi *intel_dsi)
>> {
>> DRM_DEBUG_KMS("Pclk %d\n", intel_dsi->pclk);
>> DRM_DEBUG_KMS("Pixel overlap %d\n", intel_dsi->pixel_overlap);
>> @@ -570,274 +563,6 @@ static void intel_dsi_log_params(struct intel_dsi *intel_dsi)
>> enableddisabled(!(intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA)));
>> }
>>
>> -#define ICL_PREPARE_CNT_MAX 0x7
>> -#define ICL_CLK_ZERO_CNT_MAX 0xf
>> -#define ICL_TRAIL_CNT_MAX 0x7
>> -#define ICL_TCLK_PRE_CNT_MAX 0x3
>> -#define ICL_TCLK_POST_CNT_MAX 0x7
>> -#define ICL_HS_ZERO_CNT_MAX 0xf
>> -#define ICL_EXIT_ZERO_CNT_MAX 0x7
>> -
>> -static void icl_dphy_param_init(struct intel_dsi *intel_dsi)
>> -{
>> - struct drm_device *dev = intel_dsi->base.base.dev;
>> - struct drm_i915_private *dev_priv = to_i915(dev);
>> - struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
>> - u32 tlpx_ns;
>> - u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
>> - u32 ths_prepare_ns, tclk_trail_ns;
>> - u32 hs_zero_cnt;
>> - u32 tclk_pre_cnt, tclk_post_cnt;
>> -
>> - tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
>> -
>> - tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
>> - ths_prepare_ns = max(mipi_config->ths_prepare,
>> - mipi_config->tclk_prepare);
>> -
>> - /*
>> - * prepare cnt in escape clocks
>> - * this field represents a hexadecimal value with a precision
>> - * of 1.2 – i.e. the most significant bit is the integer
>> - * and the least significant 2 bits are fraction bits.
>> - * so, the field can represent a range of 0.25 to 1.75
>> - */
>> - prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * 4, tlpx_ns);
>> - if (prepare_cnt > ICL_PREPARE_CNT_MAX) {
>> - DRM_DEBUG_KMS("prepare_cnt out of range (%d)\n", prepare_cnt);
>> - prepare_cnt = ICL_PREPARE_CNT_MAX;
>> - }
>> -
>> - /* clk zero count in escape clocks */
>> - clk_zero_cnt = DIV_ROUND_UP(mipi_config->tclk_prepare_clkzero -
>> - ths_prepare_ns, tlpx_ns);
>> - if (clk_zero_cnt > ICL_CLK_ZERO_CNT_MAX) {
>> - DRM_DEBUG_KMS("clk_zero_cnt out of range (%d)\n", clk_zero_cnt);
>> - clk_zero_cnt = ICL_CLK_ZERO_CNT_MAX;
>> - }
>> -
>> - /* trail cnt in escape clocks*/
>> - trail_cnt = DIV_ROUND_UP(tclk_trail_ns, tlpx_ns);
>> - if (trail_cnt > ICL_TRAIL_CNT_MAX) {
>> - DRM_DEBUG_KMS("trail_cnt out of range (%d)\n", trail_cnt);
>> - trail_cnt = ICL_TRAIL_CNT_MAX;
>> - }
>> -
>> - /* tclk pre count in escape clocks */
>> - tclk_pre_cnt = DIV_ROUND_UP(mipi_config->tclk_pre, tlpx_ns);
>> - if (tclk_pre_cnt > ICL_TCLK_PRE_CNT_MAX) {
>> - DRM_DEBUG_KMS("tclk_pre_cnt out of range (%d)\n", tclk_pre_cnt);
>> - tclk_pre_cnt = ICL_TCLK_PRE_CNT_MAX;
>> - }
>> -
>> - /* tclk post count in escape clocks */
>> - tclk_post_cnt = DIV_ROUND_UP(mipi_config->tclk_post, tlpx_ns);
>> - if (tclk_post_cnt > ICL_TCLK_POST_CNT_MAX) {
>> - DRM_DEBUG_KMS("tclk_post_cnt out of range (%d)\n", tclk_post_cnt);
>> - tclk_post_cnt = ICL_TCLK_POST_CNT_MAX;
>> - }
>> -
>> - /* hs zero cnt in escape clocks */
>> - hs_zero_cnt = DIV_ROUND_UP(mipi_config->ths_prepare_hszero -
>> - ths_prepare_ns, tlpx_ns);
>> - if (hs_zero_cnt > ICL_HS_ZERO_CNT_MAX) {
>> - DRM_DEBUG_KMS("hs_zero_cnt out of range (%d)\n", hs_zero_cnt);
>> - hs_zero_cnt = ICL_HS_ZERO_CNT_MAX;
>> - }
>> -
>> - /* hs exit zero cnt in escape clocks */
>> - exit_zero_cnt = DIV_ROUND_UP(mipi_config->ths_exit, tlpx_ns);
>> - if (exit_zero_cnt > ICL_EXIT_ZERO_CNT_MAX) {
>> - DRM_DEBUG_KMS("exit_zero_cnt out of range (%d)\n", exit_zero_cnt);
>> - exit_zero_cnt = ICL_EXIT_ZERO_CNT_MAX;
>> - }
>> -
>> - /* clock lane dphy timings */
>> - intel_dsi->dphy_reg = (CLK_PREPARE_OVERRIDE |
>> - CLK_PREPARE(prepare_cnt) |
>> - CLK_ZERO_OVERRIDE |
>> - CLK_ZERO(clk_zero_cnt) |
>> - CLK_PRE_OVERRIDE |
>> - CLK_PRE(tclk_pre_cnt) |
>> - CLK_POST_OVERRIDE |
>> - CLK_POST(tclk_post_cnt) |
>> - CLK_TRAIL_OVERRIDE |
>> - CLK_TRAIL(trail_cnt));
>> -
>> - /* data lanes dphy timings */
>> - intel_dsi->dphy_data_lane_reg = (HS_PREPARE_OVERRIDE |
>> - HS_PREPARE(prepare_cnt) |
>> - HS_ZERO_OVERRIDE |
>> - HS_ZERO(hs_zero_cnt) |
>> - HS_TRAIL_OVERRIDE |
>> - HS_TRAIL(trail_cnt) |
>> - HS_EXIT_OVERRIDE |
>> - HS_EXIT(exit_zero_cnt));
>> -
>> - intel_dsi_log_params(intel_dsi);
>> -}
>> -
>> -static void vlv_dphy_param_init(struct intel_dsi *intel_dsi)
>> -{
>> - struct drm_device *dev = intel_dsi->base.base.dev;
>> - struct drm_i915_private *dev_priv = to_i915(dev);
>> - struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
>> - u32 tlpx_ns, extra_byte_count, tlpx_ui;
>> - u32 ui_num, ui_den;
>> - u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
>> - u32 ths_prepare_ns, tclk_trail_ns;
>> - u32 tclk_prepare_clkzero, ths_prepare_hszero;
>> - u32 lp_to_hs_switch, hs_to_lp_switch;
>> - u32 mul;
>> -
>> - tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
>> -
>> - switch (intel_dsi->lane_count) {
>> - case 1:
>> - case 2:
>> - extra_byte_count = 2;
>> - break;
>> - case 3:
>> - extra_byte_count = 4;
>> - break;
>> - case 4:
>> - default:
>> - extra_byte_count = 3;
>> - break;
>> - }
>> -
>> - /* in Kbps */
>> - ui_num = NS_KHZ_RATIO;
>> - ui_den = intel_dsi_bitrate(intel_dsi);
>> -
>> - tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
>> - ths_prepare_hszero = mipi_config->ths_prepare_hszero;
>> -
>> - /*
>> - * B060
>> - * LP byte clock = TLPX/ (8UI)
>> - */
>> - intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
>> -
>> - /* DDR clock period = 2 * UI
>> - * UI(sec) = 1/(bitrate * 10^3) (bitrate is in KHZ)
>> - * UI(nsec) = 10^6 / bitrate
>> - * DDR clock period (nsec) = 2 * UI = (2 * 10^6)/ bitrate
>> - * DDR clock count = ns_value / DDR clock period
>> - *
>> - * For GEMINILAKE dphy_param_reg will be programmed in terms of
>> - * HS byte clock count for other platform in HS ddr clock count
>> - */
>> - mul = IS_GEMINILAKE(dev_priv) ? 8 : 2;
>> - ths_prepare_ns = max(mipi_config->ths_prepare,
>> - mipi_config->tclk_prepare);
>> -
>> - /* prepare count */
>> - prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
>> -
>> - if (prepare_cnt > PREPARE_CNT_MAX) {
>> - DRM_DEBUG_KMS("prepare count too high %u\n", prepare_cnt);
>> - prepare_cnt = PREPARE_CNT_MAX;
>> - }
>> -
>> - /* exit zero count */
>> - exit_zero_cnt = DIV_ROUND_UP(
>> - (ths_prepare_hszero - ths_prepare_ns) * ui_den,
>> - ui_num * mul
>> - );
>> -
>> - /*
>> - * Exit zero is unified val ths_zero and ths_exit
>> - * minimum value for ths_exit = 110ns
>> - * min (exit_zero_cnt * 2) = 110/UI
>> - * exit_zero_cnt = 55/UI
>> - */
>> - if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
>> - exit_zero_cnt += 1;
>> -
>> - if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
>> - DRM_DEBUG_KMS("exit zero count too high %u\n", exit_zero_cnt);
>> - exit_zero_cnt = EXIT_ZERO_CNT_MAX;
>> - }
>> -
>> - /* clk zero count */
>> - clk_zero_cnt = DIV_ROUND_UP(
>> - (tclk_prepare_clkzero - ths_prepare_ns)
>> - * ui_den, ui_num * mul);
>> -
>> - if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
>> - DRM_DEBUG_KMS("clock zero count too high %u\n", clk_zero_cnt);
>> - clk_zero_cnt = CLK_ZERO_CNT_MAX;
>> - }
>> -
>> - /* trail count */
>> - tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
>> - trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
>> -
>> - if (trail_cnt > TRAIL_CNT_MAX) {
>> - DRM_DEBUG_KMS("trail count too high %u\n", trail_cnt);
>> - trail_cnt = TRAIL_CNT_MAX;
>> - }
>> -
>> - /* B080 */
>> - intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
>> - clk_zero_cnt << 8 | prepare_cnt;
>> -
>> - /*
>> - * LP to HS switch count = 4TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT *
>> - * mul + 10UI + Extra Byte Count
>> - *
>> - * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
>> - * Extra Byte Count is calculated according to number of lanes.
>> - * High Low Switch Count is the Max of LP to HS and
>> - * HS to LP switch count
>> - *
>> - */
>> - tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
>> -
>> - /* B044 */
>> - /* FIXME:
>> - * The comment above does not match with the code */
>> - lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul +
>> - exit_zero_cnt * mul + 10, 8);
>> -
>> - hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
>> -
>> - intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
>> - intel_dsi->hs_to_lp_count += extra_byte_count;
>> -
>> - /* B088 */
>> - /* LP -> HS for clock lanes
>> - * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
>> - * extra byte count
>> - * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
>> - * 2(in UI) + extra byte count
>> - * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
>> - * 8 + extra byte count
>> - */
>> - intel_dsi->clk_lp_to_hs_count =
>> - DIV_ROUND_UP(
>> - 4 * tlpx_ui + prepare_cnt * 2 +
>> - clk_zero_cnt * 2,
>> - 8);
>> -
>> - intel_dsi->clk_lp_to_hs_count += extra_byte_count;
>> -
>> - /* HS->LP for Clock Lanes
>> - * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
>> - * Extra byte count
>> - * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
>> - * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
>> - * Extra byte count
>> - */
>> - intel_dsi->clk_hs_to_lp_count =
>> - DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
>> - 8);
>> - intel_dsi->clk_hs_to_lp_count += extra_byte_count;
>> -
>> - intel_dsi_log_params(intel_dsi);
>> -}
>> -
>> bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
>> {
>> struct drm_device *dev = intel_dsi->base.base.dev;
>> @@ -925,11 +650,6 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
>>
>> intel_dsi->burst_mode_ratio = burst_mode_ratio;
>>
>> - if (INTEL_GEN(dev_priv) >= 11)
>> - icl_dphy_param_init(intel_dsi);
>> - else
>> - vlv_dphy_param_init(intel_dsi);
>> -
>> /* delays in VBT are in unit of 100us, so need to convert
>> * here in ms
>> * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
>> diff --git a/drivers/gpu/drm/i915/vlv_dsi.c b/drivers/gpu/drm/i915/vlv_dsi.c
>> index 255996a71b91..59500c838b9d 100644
>> --- a/drivers/gpu/drm/i915/vlv_dsi.c
>> +++ b/drivers/gpu/drm/i915/vlv_dsi.c
>> @@ -1689,6 +1689,174 @@ static void intel_dsi_add_properties(struct intel_connector *connector)
>> }
>> }
>>
>> +#define NS_KHZ_RATIO 1000000
>> +
>> +#define PREPARE_CNT_MAX 0x3F
>> +#define EXIT_ZERO_CNT_MAX 0x3F
>> +#define CLK_ZERO_CNT_MAX 0xFF
>> +#define TRAIL_CNT_MAX 0x1F
>> +
>> +static void vlv_dphy_param_init(struct intel_dsi *intel_dsi)
>> +{
>> + struct drm_device *dev = intel_dsi->base.base.dev;
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
>> + u32 tlpx_ns, extra_byte_count, tlpx_ui;
>> + u32 ui_num, ui_den;
>> + u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
>> + u32 ths_prepare_ns, tclk_trail_ns;
>> + u32 tclk_prepare_clkzero, ths_prepare_hszero;
>> + u32 lp_to_hs_switch, hs_to_lp_switch;
>> + u32 mul;
>> +
>> + tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
>> +
>> + switch (intel_dsi->lane_count) {
>> + case 1:
>> + case 2:
>> + extra_byte_count = 2;
>> + break;
>> + case 3:
>> + extra_byte_count = 4;
>> + break;
>> + case 4:
>> + default:
>> + extra_byte_count = 3;
>> + break;
>> + }
>> +
>> + /* in Kbps */
>> + ui_num = NS_KHZ_RATIO;
>> + ui_den = intel_dsi_bitrate(intel_dsi);
>> +
>> + tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
>> + ths_prepare_hszero = mipi_config->ths_prepare_hszero;
>> +
>> + /*
>> + * B060
>> + * LP byte clock = TLPX/ (8UI)
>> + */
>> + intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
>> +
>> + /* DDR clock period = 2 * UI
>> + * UI(sec) = 1/(bitrate * 10^3) (bitrate is in KHZ)
>> + * UI(nsec) = 10^6 / bitrate
>> + * DDR clock period (nsec) = 2 * UI = (2 * 10^6)/ bitrate
>> + * DDR clock count = ns_value / DDR clock period
>> + *
>> + * For GEMINILAKE dphy_param_reg will be programmed in terms of
>> + * HS byte clock count for other platform in HS ddr clock count
>> + */
>> + mul = IS_GEMINILAKE(dev_priv) ? 8 : 2;
>> + ths_prepare_ns = max(mipi_config->ths_prepare,
>> + mipi_config->tclk_prepare);
>> +
>> + /* prepare count */
>> + prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
>> +
>> + if (prepare_cnt > PREPARE_CNT_MAX) {
>> + DRM_DEBUG_KMS("prepare count too high %u\n", prepare_cnt);
>> + prepare_cnt = PREPARE_CNT_MAX;
>> + }
>> +
>> + /* exit zero count */
>> + exit_zero_cnt = DIV_ROUND_UP(
>> + (ths_prepare_hszero - ths_prepare_ns) * ui_den,
>> + ui_num * mul
>> + );
>> +
>> + /*
>> + * Exit zero is unified val ths_zero and ths_exit
>> + * minimum value for ths_exit = 110ns
>> + * min (exit_zero_cnt * 2) = 110/UI
>> + * exit_zero_cnt = 55/UI
>> + */
>> + if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
>> + exit_zero_cnt += 1;
>> +
>> + if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
>> + DRM_DEBUG_KMS("exit zero count too high %u\n", exit_zero_cnt);
>> + exit_zero_cnt = EXIT_ZERO_CNT_MAX;
>> + }
>> +
>> + /* clk zero count */
>> + clk_zero_cnt = DIV_ROUND_UP(
>> + (tclk_prepare_clkzero - ths_prepare_ns)
>> + * ui_den, ui_num * mul);
>> +
>> + if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
>> + DRM_DEBUG_KMS("clock zero count too high %u\n", clk_zero_cnt);
>> + clk_zero_cnt = CLK_ZERO_CNT_MAX;
>> + }
>> +
>> + /* trail count */
>> + tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
>> + trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
>> +
>> + if (trail_cnt > TRAIL_CNT_MAX) {
>> + DRM_DEBUG_KMS("trail count too high %u\n", trail_cnt);
>> + trail_cnt = TRAIL_CNT_MAX;
>> + }
>> +
>> + /* B080 */
>> + intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
>> + clk_zero_cnt << 8 | prepare_cnt;
>> +
>> + /*
>> + * LP to HS switch count = 4TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT *
>> + * mul + 10UI + Extra Byte Count
>> + *
>> + * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
>> + * Extra Byte Count is calculated according to number of lanes.
>> + * High Low Switch Count is the Max of LP to HS and
>> + * HS to LP switch count
>> + *
>> + */
>> + tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
>> +
>> + /* B044 */
>> + /* FIXME:
>> + * The comment above does not match with the code */
>> + lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul +
>> + exit_zero_cnt * mul + 10, 8);
>> +
>> + hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
>> +
>> + intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
>> + intel_dsi->hs_to_lp_count += extra_byte_count;
>> +
>> + /* B088 */
>> + /* LP -> HS for clock lanes
>> + * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
>> + * extra byte count
>> + * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
>> + * 2(in UI) + extra byte count
>> + * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
>> + * 8 + extra byte count
>> + */
>> + intel_dsi->clk_lp_to_hs_count =
>> + DIV_ROUND_UP(
>> + 4 * tlpx_ui + prepare_cnt * 2 +
>> + clk_zero_cnt * 2,
>> + 8);
>> +
>> + intel_dsi->clk_lp_to_hs_count += extra_byte_count;
>> +
>> + /* HS->LP for Clock Lanes
>> + * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
>> + * Extra byte count
>> + * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
>> + * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
>> + * Extra byte count
>> + */
>> + intel_dsi->clk_hs_to_lp_count =
>> + DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
>> + 8);
>> + intel_dsi->clk_hs_to_lp_count += extra_byte_count;
>> +
>> + intel_dsi_log_params(intel_dsi);
>> +}
>> +
>> void vlv_dsi_init(struct drm_i915_private *dev_priv)
>> {
>> struct drm_device *dev = &dev_priv->drm;
>> @@ -1778,6 +1946,8 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv)
>> goto err;
>> }
>>
>> + vlv_dphy_param_init(intel_dsi);
>> +
>> /*
>> * In case of BYT with CRC PMIC, we need to use GPIO for
>> * Panel control.
>> --
>> 2.21.0
>
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