From 821062478ce4377b8333e96be8758670679868f3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 1 Apr 2019 23:02:30 +0300 Subject: [PATCH] drm/i915: Expose the legacy LUT via the GAMMA_LUT/GAMMA_LUT_SIZE props on gen2/3 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Just so we don't leave gen2/3 out in the cold let's advertize the legacy LUT via the GAMMA_LUT/GAMMA_LUT_SIZE props. Without the GAMMA_LUT prop we can't actually load a LUT using the atomic ioctl (in preparation for the day of 100% atomic driver). Supposedly some gen2/3 platforms have an interpolated 10bit gamma mode as well. It's slightly funkier than the i965+ mode since you have to specify the slope for the interpolation by hand. But when I tried it I couldn't get it to work, the hardware just insisted on using the 8bit more regardless of the state of the relevant PIPECONF bit. Reviewed-by: Maarten Lankhorst Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190401200231.2333-7-ville.syrjala@linux.intel.com Reviewed-by: Uma Shankar --- drivers/gpu/drm/i915/i915_pci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 84078fbd..81d14dc 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -116,6 +116,8 @@ [PIPE_C] = IVB_CURSOR_C_OFFSET, \ } +#define I9XX_COLORS \ + .color = { .gamma_lut_size = 256 } #define I965_COLORS \ .color = { .gamma_lut_size = 129, \ .gamma_lut_tests = DRM_COLOR_LUT_NON_DECREASING, \ @@ -156,6 +158,7 @@ .has_coherent_ggtt = false, \ I9XX_PIPE_OFFSETS, \ I9XX_CURSOR_OFFSETS, \ + I9XX_COLORS, \ GEN_DEFAULT_PAGE_SIZES #define I845_FEATURES \ @@ -172,6 +175,7 @@ .has_coherent_ggtt = false, \ I845_PIPE_OFFSETS, \ I845_CURSOR_OFFSETS, \ + I9XX_COLORS, \ GEN_DEFAULT_PAGE_SIZES static const struct intel_device_info intel_i830_info = { @@ -205,6 +209,7 @@ static const struct intel_device_info intel_i865g_info = { .has_coherent_ggtt = true, \ I9XX_PIPE_OFFSETS, \ I9XX_CURSOR_OFFSETS, \ + I9XX_COLORS, \ GEN_DEFAULT_PAGE_SIZES static const struct intel_device_info intel_i915g_info = { -- 2.7.4