[PATCH 8/8] drm/mgag200: Add support for G200 desktop cards
Thomas Zimmermann
tzimmermann at suse.de
Mon Jul 20 07:04:46 UTC 2020
Hi
Am 17.07.20 um 00:43 schrieb Lyude Paul:
> On Wed, 2020-07-15 at 16:59 +0200, Thomas Zimmermann wrote:
>> This patch adds support for G200 desktop cards. We can reuse the whole
>> memory and modesetting code. A few PCI and DAC register values have to
>> be updated accordingly.
>>
>> The most significant change is in the PLL setup. The get the clock limits
>> and reference clocks, parses the device's BIOS. With no BIOS found, safe
>> defaults are being used.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
>> Co-developed-by: Egbert Eich <eich at suse.com>
>> Signed-off-by: Egbert Eich <eich at suse.com>
>> Co-developed-by: Takashi Iwai <tiwai at suse.de>
>> Signed-off-by: Takashi Iwai <tiwai at suse.de>
>> ---
>> MAINTAINERS | 2 +-
>> drivers/gpu/drm/mgag200/Kconfig | 12 +--
>> drivers/gpu/drm/mgag200/mgag200_drv.c | 125 ++++++++++++++++++++++++-
>> drivers/gpu/drm/mgag200/mgag200_drv.h | 10 ++
>> drivers/gpu/drm/mgag200/mgag200_mode.c | 80 ++++++++++++++++
>> 5 files changed, 220 insertions(+), 9 deletions(-)
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 415954a98934..4c6f96e2b79b 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -5406,7 +5406,7 @@ S: Orphan / Obsolete
>> F: drivers/gpu/drm/mga/
>> F: include/uapi/drm/mga_drm.h
>>
>> -DRM DRIVER FOR MGA G200 SERVER GRAPHICS CHIPS
>> +DRM DRIVER FOR MGA G200 GRAPHICS CHIPS
>> M: Dave Airlie <airlied at redhat.com>
>> S: Odd Fixes
>> F: drivers/gpu/drm/mgag200/
>> diff --git a/drivers/gpu/drm/mgag200/Kconfig b/drivers/gpu/drm/mgag200/Kconfig
>> index 93be766715c9..eec59658a938 100644
>> --- a/drivers/gpu/drm/mgag200/Kconfig
>> +++ b/drivers/gpu/drm/mgag200/Kconfig
>> @@ -1,13 +1,11 @@
>> # SPDX-License-Identifier: GPL-2.0-only
>> config DRM_MGAG200
>> - tristate "Kernel modesetting driver for MGA G200 server engines"
>> + tristate "Matrox G200"
>> depends on DRM && PCI && MMU
>> select DRM_GEM_SHMEM_HELPER
>> select DRM_KMS_HELPER
>> help
>> - This is a KMS driver for the MGA G200 server chips, it
>> - does not support the original MGA G200 or any of the desktop
>> - chips. It requires 0.3.0 of the modesetting userspace driver,
>> - and a version of mga driver that will fail on KMS enabled
>> - devices.
>> -
>> + This is a KMS driver for Matrox G200 chips. It supports the original
>> + MGA G200 desktop chips and the server variants. It requires 0.3.0
>> + of the modesetting userspace driver, and a version of mga driver
>> + that will fail on KMS enabled devices.
>> diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c
>> b/drivers/gpu/drm/mgag200/mgag200_drv.c
>> index f7652e16365c..419817d6e2cd 100644
>> --- a/drivers/gpu/drm/mgag200/mgag200_drv.c
>> +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
>> @@ -64,6 +64,14 @@ static int mgag200_regs_init(struct mga_device *mdev)
>> u8 crtcext3;
>>
>> switch (mdev->type) {
>> + case G200_PCI:
>> + case G200_AGP:
>> + if (mgag200_has_sgram(mdev))
>> + option = 0x4049cd21;
>> + else
>> + option = 0x40499121;
>> + option2 = 0x00008000;
>> + break;
>> case G200_SE_A:
>> case G200_SE_B:
>> if (mgag200_has_sgram(mdev))
>> @@ -115,6 +123,117 @@ static int mgag200_regs_init(struct mga_device *mdev)
>> return 0;
>> }
>>
>> +static void mgag200_g200_interpret_bios(struct mga_device *mdev,
>> + unsigned char __iomem *bios,
>> + size_t size)
>> +{
>> + static const unsigned int expected_length[6] = {
>> + 0, 64, 64, 64, 128, 128
>> + };
>> +
>> + struct drm_device *dev = &mdev->base;
>> + unsigned char __iomem *pins;
>
> huh, never realized you could write directly to unsigned char __iomem pointers!
I took the patch as-is, but this probably wouldn't work on all
architectures.
>
>> + unsigned int pins_len, version;
>> + int offset;
>> + int tmp;
>> +
>> + if (size < MGA_BIOS_OFFSET + 1)
>> + return;
>> +
>> + if (bios[45] != 'M' || bios[46] != 'A' || bios[47] != 'T' ||
>> + bios[48] != 'R' || bios[49] != 'O' || bios[50] != 'X')
>> + return;
>> +
>> + offset = (bios[MGA_BIOS_OFFSET + 1] << 8) | bios[MGA_BIOS_OFFSET];
>> +
>> + if (offset + 5 > size)
>> + return;
>> +
>> + pins = bios + offset;
>> + if (pins[0] == 0x2e && pins[1] == 0x41) {
>> + version = pins[5];
>> + pins_len = pins[2];
>> + } else {
>> + version = 1;
>> + pins_len = pins[0] + (pins[1] << 8);
>> + }
>> +
>> + if (version < 1 || version > 5) {
>> + drm_warn(dev, "Unknown BIOS PInS version: %d\n", version);
>
> Did you maybe mean pins or PINS here? or is PInS some weird abbreviation matrox
> uses?
It's the name of a data structure
https://gitlab.freedesktop.org/xorg/driver/xf86-video-mga/-/blob/master/mga_PInS.txt
I have no idea what it stands for.
>
>> + return;
>> + }
>> + if (pins_len != expected_length[version]) {
>> + drm_warn(dev, "Unexpected BIOS PInS size: %d expeced: %d\n",
>> + pins_len, expected_length[version]);
>> + return;
>> + }
>> +
>> + if (offset + pins_len > size)
>> + return;
>> +
>> + drm_dbg_kms(dev, "MATROX BIOS PInS version %d size: %d found\n",
>> + version, pins_len);
>> +
>> + switch (version) {
>> + case 1:
>> + tmp = pins[24] + (pins[25] << 8);
>> + if (tmp)
>> + mdev->model.g200.pclk_max = tmp * 10;
>> + break;
>> + case 2:
>> + if (pins[41] != 0xff)
>> + mdev->model.g200.pclk_max = (pins[41] + 100) * 1000;
>> + break;
>> + case 3:
>> + if (pins[36] != 0xff)
>> + mdev->model.g200.pclk_max = (pins[36] + 100) * 1000;
>> + if (pins[52] & 0x20)
>> + mdev->model.g200.ref_clk = 14318;
>> + break;
>> + case 4:
>> + if (pins[39] != 0xff)
>> + mdev->model.g200.pclk_max = pins[39] * 4 * 1000;
>> + if (pins[92] & 0x01)
>> + mdev->model.g200.ref_clk = 14318;
>> + break;
>> + case 5:
>> + tmp = pins[4] ? 8000 : 6000;
>> + if (pins[123] != 0xff)
>> + mdev->model.g200.pclk_min = pins[123] * tmp;
>> + if (pins[38] != 0xff)
>> + mdev->model.g200.pclk_max = pins[38] * tmp;
>> + if (pins[110] & 0x01)
>> + mdev->model.g200.ref_clk = 14318;
>> + break;
>> + default:
>> + break;
>> + }
>> +}
>> +
>> +static void mgag200_g200_init_refclk(struct mga_device *mdev)
>> +{
>> + struct drm_device *dev = &mdev->base;
>> + unsigned char __iomem *bios;
>> + size_t size;
>> +
>> + mdev->model.g200.pclk_min = 50000;
>> + mdev->model.g200.pclk_max = 230000;
>> + mdev->model.g200.ref_clk = 27050;
>> +
>> + bios = pci_map_rom(dev->pdev, &size);
>> + if (!bios)
>> + return;
>> +
>> + if (size != 0 && bios[0] == 0x55 && bios[1] == 0xaa)
>> + mgag200_g200_interpret_bios(mdev, bios, size);
>> +
>> + pci_unmap_rom(dev->pdev, bios);
>> +
>> + drm_dbg_kms(dev, "pclk_min: %ld pclk_max: %ld ref_clk: %ld\n",
>> + mdev->model.g200.pclk_min, mdev->model.g200.pclk_max,
>> + mdev->model.g200.ref_clk);
>> +}
>> +
>> static void mgag200_g200se_init_unique_id(struct mga_device *mdev)
>> {
>> struct drm_device *dev = &mdev->base;
>> @@ -138,7 +257,9 @@ static int mgag200_device_init(struct mga_device *mdev,
>> unsigned long flags)
>> if (ret)
>> return ret;
>>
>> - if (IS_G200_SE(mdev))
>> + if (mdev->type == G200_PCI || mdev->type == G200_AGP)
>> + mgag200_g200_init_refclk(mdev);
>> + else if (IS_G200_SE(mdev))
>> mgag200_g200se_init_unique_id(mdev);
>>
>> ret = mgag200_mm_init(mdev);
>> @@ -182,6 +303,8 @@ mgag200_device_create(struct pci_dev *pdev, unsigned long
>> flags)
>> */
>>
>> static const struct pci_device_id mgag200_pciidlist[] = {
>> + { PCI_VENDOR_ID_MATROX, 0x520, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_PCI },
>> + { PCI_VENDOR_ID_MATROX, 0x521, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_AGP },
>> { PCI_VENDOR_ID_MATROX, 0x522, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
>> G200_SE_A | MGAG200_FLAG_HW_BUG_NO_STARTADD},
>> { PCI_VENDOR_ID_MATROX, 0x524, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_SE_B
>> },
>> diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h
>> b/drivers/gpu/drm/mgag200/mgag200_drv.h
>> index 048efe635aff..54061a61e9ca 100644
>> --- a/drivers/gpu/drm/mgag200/mgag200_drv.h
>> +++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
>> @@ -38,6 +38,8 @@
>> #define RREG32(reg) ioread32(((void __iomem *)mdev->rmmio) + (reg))
>> #define WREG32(reg, v) iowrite32(v, ((void __iomem *)mdev->rmmio) + (reg))
>>
>> +#define MGA_BIOS_OFFSET 0x7ffc
>> +
>> #define ATTR_INDEX 0x1fc0
>> #define ATTR_DATA 0x1fc1
>>
>> @@ -129,6 +131,8 @@ struct mga_mc {
>> };
>>
>> enum mga_type {
>> + G200_PCI,
>> + G200_AGP,
>> G200_SE_A,
>> G200_SE_B,
>> G200_WB,
>> @@ -167,12 +171,18 @@ struct mga_device {
>> int fb_mtrr;
>>
>> union {
>> + struct {
>> + long ref_clk;
>> + long pclk_min;
>> + long pclk_max;
>> + } g200;
>> struct {
>> /* SE model number stored in reg 0x1e24 */
>> u32 unique_rev_id;
>> } g200se;
>> } model;
>>
>> +
>> struct mga_connector connector;
>> struct drm_simple_display_pipe display_pipe;
>> };
>> diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c
>> b/drivers/gpu/drm/mgag200/mgag200_mode.c
>> index 752409c7f326..bc11552415f5 100644
>> --- a/drivers/gpu/drm/mgag200/mgag200_mode.c
>> +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
>> @@ -108,6 +108,77 @@ static inline void mga_wait_busy(struct mga_device *mdev)
>> } while ((status & 0x01) && time_before(jiffies, timeout));
>> }
>>
>> +/*
>> + * PLL setup
>> + */
>> +
>> +static int mgag200_g200_set_plls(struct mga_device *mdev, long clock)
>> +{
>> + struct drm_device *dev = &mdev->base;
>> + const int post_div_max = 7;
>> + const int in_div_min = 1;
>> + const int in_div_max = 6;
>> + const int feed_div_min = 7;
>> + const int feed_div_max = 127;
>> + u8 testm, testn;
>> + u8 n = 0, m = 0, p, s;
>> + long f_vco;
>> + long computed;
>> + long delta, tmp_delta;
>> + long ref_clk = mdev->model.g200.ref_clk;
>> + long p_clk_min = mdev->model.g200.pclk_min;
>> + long p_clk_max = mdev->model.g200.pclk_max;
>> +
>> + if (clock > p_clk_max) {
>> + drm_err(dev, "Pixel Clock %ld too high\n", clock);
>> + return 1;
>> + }
>> +
>> + if (clock < p_clk_min >> 3)
>
> Looks like there's a stray space after the <. You could also just use max()
> here, but I'll leave that up to you
>
>> + clock = p_clk_min >> 3;
>> +
>> + f_vco = clock;
>> + for (p = 0;
>> + p <= post_div_max && f_vco < p_clk_min;
>> + p = (p << 1) + 1, f_vco <<= 1)
>> + ;
>> +
>> + delta = clock;
>> +
>> + for (testm = in_div_min; testm <= in_div_max; testm++) {
>> + for (testn = feed_div_min; testn <= feed_div_max; testn++) {
>> + computed = ref_clk * (testn + 1) / (testm + 1);
>> + if (computed < f_vco)
>> + tmp_delta = f_vco - computed;
>> + else
>> + tmp_delta = computed - f_vco;
>
> Another stray space before the =
>
> With those nitpicks addressed, this series is:
>
> Reviewed-by: Lyude Paul <lyude at redhat.com>
Thanks a lot.
The other patches are probably uncontoversial. Let's see what happens to
this one. :)
Best regards
Thomas
>
>> + if (tmp_delta < delta) {
>> + delta = tmp_delta;
>> + m = testm;
>> + n = testn;
>> + }
>> + }
>> + }
>> + f_vco = ref_clk * (n + 1) / (m + 1);
>> + if (f_vco < 100000)
>> + s = 0;
>> + else if (f_vco < 140000)
>> + s = 1;
>> + else if (f_vco < 180000)
>> + s = 2;
>> + else
>> + s = 3;
>> +
>> + drm_dbg_kms(dev, "clock: %ld vco: %ld m: %d n: %d p: %d s: %d\n",
>> + clock, f_vco, m, n, p, s);
>> +
>> + WREG_DAC(MGA1064_PIX_PLLC_M, m);
>> + WREG_DAC(MGA1064_PIX_PLLC_N, n);
>> + WREG_DAC(MGA1064_PIX_PLLC_P, (p | (s << 3)));
>> +
>> + return 0;
>> +}
>> +
>> #define P_ARRAY_SIZE 9
>>
>> static int mga_g200se_set_plls(struct mga_device *mdev, long clock)
>> @@ -717,6 +788,9 @@ static int mgag200_crtc_set_plls(struct mga_device *mdev,
>> long clock)
>> u8 misc;
>>
>> switch(mdev->type) {
>> + case G200_PCI:
>> + case G200_AGP:
>> + return mgag200_g200_set_plls(mdev, clock);
>> case G200_SE_A:
>> case G200_SE_B:
>> return mga_g200se_set_plls(mdev, clock);
>> @@ -894,6 +968,12 @@ static void mgag200_set_dac_regs(struct mga_device *mdev)
>> };
>>
>> switch (mdev->type) {
>> + case G200_PCI:
>> + case G200_AGP:
>> + dacvalue[MGA1064_SYS_PLL_M] = 0x04;
>> + dacvalue[MGA1064_SYS_PLL_N] = 0x2D;
>> + dacvalue[MGA1064_SYS_PLL_P] = 0x19;
>> + break;
>> case G200_SE_A:
>> case G200_SE_B:
>> dacvalue[MGA1064_VREF_CTL] = 0x03;
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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