[PATCH] drm/edid: Fix EDID quirk compile error on older compilers
Douglas Anderson
dianders at chromium.org
Fri Sep 24 14:53:21 UTC 2021
Apparently some compilers [1] cannot handle doing math on dereferenced
string constants at compile time. This has led to reports [2] of
compile errors like:
In file included from drivers/gpu/drm/drm_edid.c:42:0:
./include/drm/drm_edid.h:525:2: error: initializer element is not constant
((((u32)((vend)[0]) - '@') & 0x1f) << 26 | \
Go back to the syntax I used in v4 of the patch series [3] that added
this code instead of what landed (v5). This syntax is slightly uglier
but should be much more compatible with varied compilers.
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69960#c18
[2] https://lore.kernel.org/r/874kaabdt5.fsf@intel.com/
[3] https://lore.kernel.org/r/20210909135838.v4.4.I6103ce2b16e5e5a842b14c7022a034712b434609@changeid/
Fixes: d9f91a10c3e8 ("drm/edid: Allow querying/working with the panel ID from the EDID")
Reported-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
Reported-by: Srikanth Myakam <smyakam at microsoft.com>
Signed-off-by: Douglas Anderson <dianders at chromium.org>
---
drivers/gpu/drm/drm_edid.c | 121 +++++++++++++++---------------
drivers/gpu/drm/panel/panel-edp.c | 23 +++---
include/drm/drm_edid.h | 14 ++--
3 files changed, 81 insertions(+), 77 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 53b342c058be..9b19eee0e1b4 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -100,9 +100,10 @@ struct detailed_mode_closure {
#define LEVEL_GTF2 2
#define LEVEL_CVT 3
-#define EDID_QUIRK(vend, product_id, _quirks) \
+#define EDID_QUIRK(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _quirks) \
{ \
- .panel_id = drm_edid_encode_panel_id(vend, product_id), \
+ .panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
+ product_id), \
.quirks = _quirks \
}
@@ -111,116 +112,116 @@ static const struct edid_quirk {
u32 quirks;
} edid_quirk_list[] = {
/* Acer AL1706 */
- EDID_QUIRK("ACR", 44358, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('A', 'C', 'R', 44358, EDID_QUIRK_PREFER_LARGE_60),
/* Acer F51 */
- EDID_QUIRK("API", 0x7602, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('A', 'P', 'I', 0x7602, EDID_QUIRK_PREFER_LARGE_60),
/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
- EDID_QUIRK("AEO", 0, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('A', 'E', 'O', 0, EDID_QUIRK_FORCE_6BPC),
/* BOE model on HP Pavilion 15-n233sl reports 8 bpc, but is a 6 bpc panel */
- EDID_QUIRK("BOE", 0x78b, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('B', 'O', 'E', 0x78b, EDID_QUIRK_FORCE_6BPC),
/* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
- EDID_QUIRK("CPT", 0x17df, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('C', 'P', 'T', 0x17df, EDID_QUIRK_FORCE_6BPC),
/* SDC panel of Lenovo B50-80 reports 8 bpc, but is a 6 bpc panel */
- EDID_QUIRK("SDC", 0x3652, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('S', 'D', 'C', 0x3652, EDID_QUIRK_FORCE_6BPC),
/* BOE model 0x0771 reports 8 bpc, but is a 6 bpc panel */
- EDID_QUIRK("BOE", 0x0771, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('B', 'O', 'E', 0x0771, EDID_QUIRK_FORCE_6BPC),
/* Belinea 10 15 55 */
- EDID_QUIRK("MAX", 1516, EDID_QUIRK_PREFER_LARGE_60),
- EDID_QUIRK("MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('M', 'A', 'X', 1516, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('M', 'A', 'X', 0x77e, EDID_QUIRK_PREFER_LARGE_60),
/* Envision Peripherals, Inc. EN-7100e */
- EDID_QUIRK("EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH),
+ EDID_QUIRK('E', 'P', 'I', 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH),
/* Envision EN2028 */
- EDID_QUIRK("EPI", 8232, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('E', 'P', 'I', 8232, EDID_QUIRK_PREFER_LARGE_60),
/* Funai Electronics PM36B */
- EDID_QUIRK("FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
+ EDID_QUIRK('F', 'C', 'M', 13600, EDID_QUIRK_PREFER_LARGE_75 |
EDID_QUIRK_DETAILED_IN_CM),
/* LGD panel of HP zBook 17 G2, eDP 10 bpc, but reports unknown bpc */
- EDID_QUIRK("LGD", 764, EDID_QUIRK_FORCE_10BPC),
+ EDID_QUIRK('L', 'G', 'D', 764, EDID_QUIRK_FORCE_10BPC),
/* LG Philips LCD LP154W01-A5 */
- EDID_QUIRK("LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),
- EDID_QUIRK("LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),
+ EDID_QUIRK('L', 'P', 'L', 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),
+ EDID_QUIRK('L', 'P', 'L', 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE),
/* Samsung SyncMaster 205BW. Note: irony */
- EDID_QUIRK("SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP),
+ EDID_QUIRK('S', 'A', 'M', 541, EDID_QUIRK_DETAILED_SYNC_PP),
/* Samsung SyncMaster 22[5-6]BW */
- EDID_QUIRK("SAM", 596, EDID_QUIRK_PREFER_LARGE_60),
- EDID_QUIRK("SAM", 638, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('S', 'A', 'M', 596, EDID_QUIRK_PREFER_LARGE_60),
+ EDID_QUIRK('S', 'A', 'M', 638, EDID_QUIRK_PREFER_LARGE_60),
/* Sony PVM-2541A does up to 12 bpc, but only reports max 8 bpc */
- EDID_QUIRK("SNY", 0x2541, EDID_QUIRK_FORCE_12BPC),
+ EDID_QUIRK('S', 'N', 'Y', 0x2541, EDID_QUIRK_FORCE_12BPC),
/* ViewSonic VA2026w */
- EDID_QUIRK("VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING),
+ EDID_QUIRK('V', 'S', 'C', 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING),
/* Medion MD 30217 PG */
- EDID_QUIRK("MED", 0x7b8, EDID_QUIRK_PREFER_LARGE_75),
+ EDID_QUIRK('M', 'E', 'D', 0x7b8, EDID_QUIRK_PREFER_LARGE_75),
/* Lenovo G50 */
- EDID_QUIRK("SDC", 18514, EDID_QUIRK_FORCE_6BPC),
+ EDID_QUIRK('S', 'D', 'C', 18514, EDID_QUIRK_FORCE_6BPC),
/* Panel in Samsung NP700G7A-S01PL notebook reports 6bpc */
- EDID_QUIRK("SEC", 0xd033, EDID_QUIRK_FORCE_8BPC),
+ EDID_QUIRK('S', 'E', 'C', 0xd033, EDID_QUIRK_FORCE_8BPC),
/* Rotel RSX-1058 forwards sink's EDID but only does HDMI 1.1*/
- EDID_QUIRK("ETR", 13896, EDID_QUIRK_FORCE_8BPC),
+ EDID_QUIRK('E', 'T', 'R', 13896, EDID_QUIRK_FORCE_8BPC),
/* Valve Index Headset */
- EDID_QUIRK("VLV", 0x91a8, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b0, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b1, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b2, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b3, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b4, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b5, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b6, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b7, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b8, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91b9, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91ba, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91bb, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91bc, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91bd, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91be, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("VLV", 0x91bf, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91a8, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b0, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b1, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b2, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b3, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b4, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b5, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b6, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b7, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b8, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91b9, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91ba, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91bb, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91bc, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91bd, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91be, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('V', 'L', 'V', 0x91bf, EDID_QUIRK_NON_DESKTOP),
/* HTC Vive and Vive Pro VR Headsets */
- EDID_QUIRK("HVR", 0xaa01, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("HVR", 0xaa02, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('H', 'V', 'R', 0xaa01, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('H', 'V', 'R', 0xaa02, EDID_QUIRK_NON_DESKTOP),
/* Oculus Rift DK1, DK2, CV1 and Rift S VR Headsets */
- EDID_QUIRK("OVR", 0x0001, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("OVR", 0x0003, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("OVR", 0x0004, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("OVR", 0x0012, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('O', 'V', 'R', 0x0001, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('O', 'V', 'R', 0x0003, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('O', 'V', 'R', 0x0004, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('O', 'V', 'R', 0x0012, EDID_QUIRK_NON_DESKTOP),
/* Windows Mixed Reality Headsets */
- EDID_QUIRK("ACR", 0x7fce, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("HPN", 0x3515, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("LEN", 0x0408, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("LEN", 0xb800, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("FUJ", 0x1970, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("DEL", 0x7fce, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("SEC", 0x144a, EDID_QUIRK_NON_DESKTOP),
- EDID_QUIRK("AUS", 0xc102, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('A', 'C', 'R', 0x7fce, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('H', 'P', 'N', 0x3515, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('L', 'E', 'N', 0x0408, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('L', 'E', 'N', 0xb800, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('F', 'U', 'J', 0x1970, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('D', 'E', 'L', 0x7fce, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('S', 'E', 'C', 0x144a, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('A', 'U', 'S', 0xc102, EDID_QUIRK_NON_DESKTOP),
/* Sony PlayStation VR Headset */
- EDID_QUIRK("SNY", 0x0704, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('S', 'N', 'Y', 0x0704, EDID_QUIRK_NON_DESKTOP),
/* Sensics VR Headsets */
- EDID_QUIRK("SEN", 0x1019, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('S', 'E', 'N', 0x1019, EDID_QUIRK_NON_DESKTOP),
/* OSVR HDK and HDK2 VR Headsets */
- EDID_QUIRK("SVR", 0x1019, EDID_QUIRK_NON_DESKTOP),
+ EDID_QUIRK('S', 'V', 'R', 0x1019, EDID_QUIRK_NON_DESKTOP),
};
/*
diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 4c37c4f6d26c..fc03046de134 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -1745,10 +1745,11 @@ static const struct panel_delay delay_200_500_e50 = {
.enable = 50,
};
-#define EDP_PANEL_ENTRY(vend, product_id, _delay, _name) \
+#define EDP_PANEL_ENTRY(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name) \
{ \
.name = _name, \
- .panel_id = drm_edid_encode_panel_id(vend, product_id), \
+ .panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \
+ product_id), \
.delay = _delay \
}
@@ -1760,19 +1761,19 @@ static const struct panel_delay delay_200_500_e50 = {
* Sort first by vendor, then by product ID.
*/
static const struct edp_panel_entry edp_panels[] = {
- EDP_PANEL_ENTRY("AUO", 0x405c, &auo_b116xak01.delay, "B116XAK01"),
- EDP_PANEL_ENTRY("AUO", 0x615c, &delay_200_500_e50, "B116XAN06.1"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01"),
+ EDP_PANEL_ENTRY('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1"),
- EDP_PANEL_ENTRY("BOE", 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"),
- EDP_PANEL_ENTRY("BOE", 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"),
- EDP_PANEL_ENTRY("BOE", 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"),
- EDP_PANEL_ENTRY("BOE", 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"),
+ EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"),
- EDP_PANEL_ENTRY("CMN", 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
+ EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"),
- EDP_PANEL_ENTRY("KDB", 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"),
+ EDP_PANEL_ENTRY('K', 'D', 'B', 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"),
- EDP_PANEL_ENTRY("SHP", 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"),
+ EDP_PANEL_ENTRY('S', 'H', 'P', 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"),
{ /* sentinal */ }
};
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index ccc80cb7f86a..4d17cd04fff7 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -510,21 +510,23 @@ static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
/**
* drm_edid_encode_panel_id - Encode an ID for matching against drm_edid_get_panel_id()
- * @vend: 3-character vendor string
+ * @vend_chr_0: First character of the vendor string.
+ * @vend_chr_2: Second character of the vendor string.
+ * @vend_chr_3: Third character of the vendor string.
* @product_id: The 16-bit product ID.
*
* This is a macro so that it can be calculated at compile time and used
* as an initializer.
*
* For instance:
- * drm_edid_encode_panel_id("BOE", 0x2d08) => 0x09e52d08
+ * drm_edid_encode_panel_id('B', 'O', 'E', 0x2d08) => 0x09e52d08
*
* Return: a 32-bit ID per panel.
*/
-#define drm_edid_encode_panel_id(vend, product_id) \
- ((((u32)((vend)[0]) - '@') & 0x1f) << 26 | \
- (((u32)((vend)[1]) - '@') & 0x1f) << 21 | \
- (((u32)((vend)[2]) - '@') & 0x1f) << 16 | \
+#define drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, product_id) \
+ ((((u32)(vend_chr_0) - '@') & 0x1f) << 26 | \
+ (((u32)(vend_chr_1) - '@') & 0x1f) << 21 | \
+ (((u32)(vend_chr_2) - '@') & 0x1f) << 16 | \
((product_id) & 0xffff))
/**
--
2.33.0.685.g46640cef36-goog
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