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drm/i915: Extract out gamma table and CSC to their own file

Browse source 
The moves a couple of functions programming the gamma LUT and CSC
units into their own file.

On generations prior to Haswell there is only a gamma LUT. From
haswell on there is also a new enhanced color correction unit that
isn't used yet. This is why we need to set the GAMMA_MODE register,
either we're using the legacy 8bits LUT or enhanced LUTs (of 10 or
12bits).

The CSC unit is only available from Haswell on.

We also need to make a special case for CherryView which is recognized
as a gen 8 but doesn't have the same enhanced color correction unit
from Haswell on.

v2: Fix access to GAMMA_MODE register on older generations than
    Haswell (from Matt Roper's comments)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1458125837-2576-2-git-send-email-lionel.g.landwerlin@intel.com
This commit is contained in:
Lionel Landwerlin 2016-03-16 10:57:14 +00:00 committed by Matt Roper
parent 2e85ab4fed
commit 8563b1e8ef
5 changed files with 216 additions and 159 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/i915/Makefile
View file

@ -55,6 +55,7 @@ i915-y += intel_audio.o \
intel_atomic.o \
intel_atomic_plane.o \
intel_bios.o \
intel_color.o \
intel_display.o \
intel_dpll_mgr.o \
intel_fbc.o \

2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -629,6 +629,8 @@ struct drm_i915_display_funcs {
/* render clock increase/decrease */
/* display clock increase/decrease */
/* pll clock increase/decrease */
void (*load_luts)(struct drm_crtc *crtc);
};
enum forcewake_domain_id {

191
drivers/gpu/drm/i915/intel_color.c Normal file
View file

@ -0,0 +1,191 @@
/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
#include "intel_drv.h"
/*
* Set up the pipe CSC unit.
*
* Currently only full range RGB to limited range RGB conversion
* is supported, but eventually this should handle various
* RGB<->YCbCr scenarios as well.
*/
static void i9xx_load_csc_matrix(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
uint16_t coeff = 0x7800; /* 1.0 */
/*
* TODO: Check what kind of values actually come out of the pipe
* with these coeff/postoff values and adjust to get the best
* accuracy. Perhaps we even need to take the bpc value into
* consideration.
*/
if (intel_crtc->config->limited_color_range)
coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
if (INTEL_INFO(dev)->gen > 6) {
uint16_t postoff = 0;
if (intel_crtc->config->limited_color_range)
postoff = (16 * (1 << 12) / 255) & 0x1fff;
I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
I915_WRITE(PIPE_CSC_MODE(pipe), 0);
} else {
uint32_t mode = CSC_MODE_YUV_TO_RGB;
if (intel_crtc->config->limited_color_range)
mode |= CSC_BLACK_SCREEN_OFFSET;
I915_WRITE(PIPE_CSC_MODE(pipe), mode);
}
}
void intel_color_set_csc(struct drm_crtc *crtc)
{
i9xx_load_csc_matrix(crtc);
}
/* Loads the palette/gamma unit for the CRTC with the prepared values. */
static void i9xx_load_luts(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
enum pipe pipe = intel_crtc->pipe;
int i;
if (HAS_GMCH_DISPLAY(dev)) {
if (intel_crtc->config->has_dsi_encoder)
assert_dsi_pll_enabled(dev_priv);
else
assert_pll_enabled(dev_priv, pipe);
}
for (i = 0; i < 256; i++) {
uint32_t word = (intel_crtc->lut_r[i] << 16) |
(intel_crtc->lut_g[i] << 8) |
intel_crtc->lut_b[i];
if (HAS_GMCH_DISPLAY(dev))
I915_WRITE(PALETTE(pipe, i), word);
else
I915_WRITE(LGC_PALETTE(pipe, i), word);
}
}
/* Loads the legacy palette/gamma unit for the CRTC on Haswell+. */
static void haswell_load_luts(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
bool reenable_ips = false;
/*
* Workaround : Do not read or write the pipe palette/gamma data while
* GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
*/
if (IS_HASWELL(dev) && intel_crtc->config->ips_enabled &&
((I915_READ(GAMMA_MODE(intel_crtc->pipe)) & GAMMA_MODE_MODE_MASK) ==
GAMMA_MODE_MODE_SPLIT)) {
hsw_disable_ips(intel_crtc);
reenable_ips = true;
}
I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
i9xx_load_luts(crtc);
if (reenable_ips)
hsw_enable_ips(intel_crtc);
}
void intel_color_load_luts(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
/* The clocks have to be on to load the palette. */
if (!crtc->state->active)
return;
dev_priv->display.load_luts(crtc);
}
void intel_color_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t start, uint32_t size)
{
int end = (start + size > 256) ? 256 : start + size, i;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
for (i = start; i < end; i++) {
intel_crtc->lut_r[i] = red[i] >> 8;
intel_crtc->lut_g[i] = green[i] >> 8;
intel_crtc->lut_b[i] = blue[i] >> 8;
}
intel_color_load_luts(crtc);
}
void intel_color_init(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int i;
drm_mode_crtc_set_gamma_size(crtc, 256);
for (i = 0; i < 256; i++) {
intel_crtc->lut_r[i] = i;
intel_crtc->lut_g[i] = i;
intel_crtc->lut_b[i] = i;
}
if (IS_HASWELL(dev) ||
(INTEL_INFO(dev)->gen >= 8 && !IS_CHERRYVIEW(dev))) {
dev_priv->display.load_luts = haswell_load_luts;
} else {
dev_priv->display.load_luts = i9xx_load_luts;
}
}

171
drivers/gpu/drm/i915/intel_display.c
View file

@ -102,9 +102,7 @@ static void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
struct intel_link_m_n *m2_n2);
static void ironlake_set_pipeconf(struct drm_crtc *crtc);
static void haswell_set_pipeconf(struct drm_crtc *crtc);
static void haswell_set_pipe_gamma(struct drm_crtc *crtc);
static void haswell_set_pipemisc(struct drm_crtc *crtc);
static void intel_set_pipe_csc(struct drm_crtc *crtc);
static void vlv_prepare_pll(struct intel_crtc *crtc,
const struct intel_crtc_state *pipe_config);
static void chv_prepare_pll(struct intel_crtc *crtc,
@ -1183,7 +1181,7 @@ void assert_pll(struct drm_i915_private *dev_priv,
}
/* XXX: the dsi pll is shared between MIPI DSI ports */
static void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
{
u32 val;
bool cur_state;
@ -1197,8 +1195,6 @@ static void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
"DSI PLL state assertion failure (expected %s, current %s)\n",
onoff(state), onoff(cur_state));
}
#define assert_dsi_pll_enabled(d) assert_dsi_pll(d, true)
#define assert_dsi_pll_disabled(d) assert_dsi_pll(d, false)
static void assert_fdi_tx(struct drm_i915_private *dev_priv,
enum pipe pipe, bool state)
@ -3270,7 +3266,7 @@ static void intel_update_pipe_config(struct intel_crtc *crtc,
pipe_config->pipe_src_w, pipe_config->pipe_src_h);
if (HAS_DDI(dev))
intel_set_pipe_csc(&crtc->base);
intel_color_set_csc(&crtc->base);
/*
* Update pipe size and adjust fitter if needed: the reason for this is
@ -4510,55 +4506,6 @@ void hsw_disable_ips(struct intel_crtc *crtc)
intel_wait_for_vblank(dev, crtc->pipe);
}
/** Loads the palette/gamma unit for the CRTC with the prepared values */
static void intel_crtc_load_lut(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
enum pipe pipe = intel_crtc->pipe;
int i;
bool reenable_ips = false;
/* The clocks have to be on to load the palette. */
if (!crtc->state->active)
return;
if (HAS_GMCH_DISPLAY(dev_priv->dev)) {
if (intel_crtc->config->has_dsi_encoder)
assert_dsi_pll_enabled(dev_priv);
else
assert_pll_enabled(dev_priv, pipe);
}
/* Workaround : Do not read or write the pipe palette/gamma data while
* GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
*/
if (IS_HASWELL(dev) && intel_crtc->config->ips_enabled &&
((I915_READ(GAMMA_MODE(pipe)) & GAMMA_MODE_MODE_MASK) ==
GAMMA_MODE_MODE_SPLIT)) {
hsw_disable_ips(intel_crtc);
reenable_ips = true;
}
for (i = 0; i < 256; i++) {
i915_reg_t palreg;
if (HAS_GMCH_DISPLAY(dev))
palreg = PALETTE(pipe, i);
else
palreg = LGC_PALETTE(pipe, i);
I915_WRITE(palreg,
(intel_crtc->lut_r[i] << 16) |
(intel_crtc->lut_g[i] << 8) |
intel_crtc->lut_b[i]);
}
if (reenable_ips)
hsw_enable_ips(intel_crtc);
}
static void intel_crtc_dpms_overlay_disable(struct intel_crtc *intel_crtc)
{
if (intel_crtc->overlay) {
@ -4863,7 +4810,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
* On ILK+ LUT must be loaded before the pipe is running but with
* clocks enabled
*/
intel_crtc_load_lut(crtc);
intel_color_load_luts(crtc);
if (dev_priv->display.initial_watermarks != NULL)
dev_priv->display.initial_watermarks(intel_crtc->config);
@ -4936,10 +4883,9 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
if (!intel_crtc->config->has_dsi_encoder)
haswell_set_pipeconf(crtc);
haswell_set_pipe_gamma(crtc);
haswell_set_pipemisc(crtc);
intel_set_pipe_csc(crtc);
intel_color_set_csc(crtc);
intel_crtc->active = true;
@ -4968,7 +4914,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
* On ILK+ LUT must be loaded before the pipe is running but with
* clocks enabled
*/
intel_crtc_load_lut(crtc);
intel_color_load_luts(crtc);
intel_ddi_set_pipe_settings(crtc);
if (!intel_crtc->config->has_dsi_encoder)
@ -6173,7 +6119,7 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
i9xx_pfit_enable(intel_crtc);
intel_crtc_load_lut(crtc);
intel_color_load_luts(crtc);
intel_update_watermarks(crtc);
intel_enable_pipe(intel_crtc);
@ -6228,7 +6174,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
i9xx_pfit_enable(intel_crtc);
intel_crtc_load_lut(crtc);
intel_color_load_luts(crtc);
intel_update_watermarks(crtc);
intel_enable_pipe(intel_crtc);
@ -8713,70 +8659,6 @@ static void ironlake_set_pipeconf(struct drm_crtc *crtc)
POSTING_READ(PIPECONF(pipe));
}
/*
* Set up the pipe CSC unit.
*
* Currently only full range RGB to limited range RGB conversion
* is supported, but eventually this should handle various
* RGB<->YCbCr scenarios as well.
*/
static void intel_set_pipe_csc(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
uint16_t coeff = 0x7800; /* 1.0 */
/*
* TODO: Check what kind of values actually come out of the pipe
* with these coeff/postoff values and adjust to get the best
* accuracy. Perhaps we even need to take the bpc value into
* consideration.
*/
if (intel_crtc->config->limited_color_range)
coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
/*
* GY/GU and RY/RU should be the other way around according
* to BSpec, but reality doesn't agree. Just set them up in
* a way that results in the correct picture.
*/
I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
if (INTEL_INFO(dev)->gen > 6) {
uint16_t postoff = 0;
if (intel_crtc->config->limited_color_range)
postoff = (16 * (1 << 12) / 255) & 0x1fff;
I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
I915_WRITE(PIPE_CSC_MODE(pipe), 0);
} else {
uint32_t mode = CSC_MODE_YUV_TO_RGB;
if (intel_crtc->config->limited_color_range)
mode |= CSC_BLACK_SCREEN_OFFSET;
I915_WRITE(PIPE_CSC_MODE(pipe), mode);
}
}
static void haswell_set_pipeconf(struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
@ -8796,15 +8678,6 @@ static void haswell_set_pipeconf(struct drm_crtc *crtc)
POSTING_READ(PIPECONF(cpu_transcoder));
}
static void haswell_set_pipe_gamma(struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
POSTING_READ(GAMMA_MODE(intel_crtc->pipe));
}
static void haswell_set_pipemisc(struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
@ -10315,21 +10188,6 @@ static bool cursor_size_ok(struct drm_device *dev,
return true;
}
static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t start, uint32_t size)
{
int end = (start + size > 256) ? 256 : start + size, i;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
for (i = start; i < end; i++) {
intel_crtc->lut_r[i] = red[i] >> 8;
intel_crtc->lut_g[i] = green[i] >> 8;
intel_crtc->lut_b[i] = blue[i] >> 8;
}
intel_crtc_load_lut(crtc);
}
/* VESA 640x480x72Hz mode to set on the pipe */
static struct drm_display_mode load_detect_mode = {
DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
@ -12092,7 +11950,7 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
static const struct drm_crtc_helper_funcs intel_helper_funcs = {
.mode_set_base_atomic = intel_pipe_set_base_atomic,
.load_lut = intel_crtc_load_lut,
.load_lut = intel_color_load_luts,
.atomic_begin = intel_begin_crtc_commit,
.atomic_flush = intel_finish_crtc_commit,
.atomic_check = intel_crtc_atomic_check,
@ -13825,7 +13683,7 @@ out:
#undef for_each_intel_crtc_masked
static const struct drm_crtc_funcs intel_crtc_funcs = {
.gamma_set = intel_crtc_gamma_set,
.gamma_set = intel_color_legacy_gamma_set,
.set_config = drm_atomic_helper_set_config,
.destroy = intel_crtc_destroy,
.page_flip = intel_crtc_page_flip,
@ -14329,7 +14187,7 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
struct intel_crtc_state *crtc_state = NULL;
struct drm_plane *primary = NULL;
struct drm_plane *cursor = NULL;
int i, ret;
int ret;
intel_crtc = kzalloc(sizeof(*intel_crtc), GFP_KERNEL);
if (intel_crtc == NULL)
@ -14365,13 +14223,6 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
if (ret)
goto fail;
drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
for (i = 0; i < 256; i++) {
intel_crtc->lut_r[i] = i;
intel_crtc->lut_g[i] = i;
intel_crtc->lut_b[i] = i;
}
/*
* On gen2/3 only plane A can do fbc, but the panel fitter and lvds port
* is hooked to pipe B. Hence we want plane A feeding pipe B.
@ -14396,6 +14247,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
intel_color_init(&intel_crtc->base);
WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe);
return;

10
drivers/gpu/drm/i915/intel_drv.h
View file

@ -1199,6 +1199,9 @@ void assert_pll(struct drm_i915_private *dev_priv,
enum pipe pipe, bool state);
#define assert_pll_enabled(d, p) assert_pll(d, p, true)
#define assert_pll_disabled(d, p) assert_pll(d, p, false)
void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state);
#define assert_dsi_pll_enabled(d) assert_dsi_pll(d, true)
#define assert_dsi_pll_disabled(d) assert_dsi_pll(d, false)
void assert_fdi_rx_pll(struct drm_i915_private *dev_priv,
enum pipe pipe, bool state);
#define assert_fdi_rx_pll_enabled(d, p) assert_fdi_rx_pll(d, p, true)
@ -1660,4 +1663,11 @@ void intel_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state);
extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
/* intel_color.c */
void intel_color_init(struct drm_crtc *crtc);
void intel_color_set_csc(struct drm_crtc *crtc);
void intel_color_load_luts(struct drm_crtc *crtc);
void intel_color_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t start, uint32_t size);
#endif /* __INTEL_DRV_H__ */