On Mon, Feb 13, 2023 at 09:59:56PM +0200, Jani Nikula wrote:
> The memory frequency detection is a bit spread out here and
> there. Consolidate to intel_dram.c.
>
> v2:
> - Remove inaccurate comment (Ville)
> - Call detect_mem_freq() unconditionally (Ville)
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Couldn't spot any chicken vs. egg issues anywhere
so seems good.
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/intel_rps.c | 29 -----
> drivers/gpu/drm/i915/intel_pm.c | 101 -----------------
> drivers/gpu/drm/i915/soc/intel_dram.c | 152 ++++++++++++++++++++++++++
> 3 files changed, 152 insertions(+), 130 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
> index f5d7b5126433..4d0dc9de23f9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_rps.c
> +++ b/drivers/gpu/drm/i915/gt/intel_rps.c
> @@ -1677,7 +1677,6 @@ static void vlv_init_gpll_ref_freq(struct intel_rps *rps)
> static void vlv_rps_init(struct intel_rps *rps)
> {
> struct drm_i915_private *i915 = rps_to_i915(rps);
> - u32 val;
>
> vlv_iosf_sb_get(i915,
> BIT(VLV_IOSF_SB_PUNIT) |
> @@ -1686,21 +1685,6 @@ static void vlv_rps_init(struct intel_rps *rps)
>
> vlv_init_gpll_ref_freq(rps);
>
> - val = vlv_punit_read(i915, PUNIT_REG_GPU_FREQ_STS);
> - switch ((val >> 6) & 3) {
> - case 0:
> - case 1:
> - i915->mem_freq = 800;
> - break;
> - case 2:
> - i915->mem_freq = 1066;
> - break;
> - case 3:
> - i915->mem_freq = 1333;
> - break;
> - }
> - drm_dbg(&i915->drm, "DDR speed: %d MHz\n", i915->mem_freq);
> -
> rps->max_freq = vlv_rps_max_freq(rps);
> rps->rp0_freq = rps->max_freq;
> drm_dbg(&i915->drm, "max GPU freq: %d MHz (%u)\n",
> @@ -1727,7 +1711,6 @@ static void vlv_rps_init(struct intel_rps *rps)
> static void chv_rps_init(struct intel_rps *rps)
> {
> struct drm_i915_private *i915 = rps_to_i915(rps);
> - u32 val;
>
> vlv_iosf_sb_get(i915,
> BIT(VLV_IOSF_SB_PUNIT) |
> @@ -1736,18 +1719,6 @@ static void chv_rps_init(struct intel_rps *rps)
>
> vlv_init_gpll_ref_freq(rps);
>
> - val = vlv_cck_read(i915, CCK_FUSE_REG);
> -
> - switch ((val >> 2) & 0x7) {
> - case 3:
> - i915->mem_freq = 2000;
> - break;
> - default:
> - i915->mem_freq = 1600;
> - break;
> - }
> - drm_dbg(&i915->drm, "DDR speed: %d MHz\n", i915->mem_freq);
> -
> rps->max_freq = chv_rps_max_freq(rps);
> rps->rp0_freq = rps->max_freq;
> drm_dbg(&i915->drm, "max GPU freq: %d MHz (%u)\n",
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 34863e9bd54a..0d3084b74c77 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -131,101 +131,6 @@ static void glk_init_clock_gating(struct drm_i915_private *dev_priv)
> PWM1_GATING_DIS | PWM2_GATING_DIS);
> }
>
> -static void pnv_get_mem_freq(struct drm_i915_private *dev_priv)
> -{
> - u32 tmp;
> -
> - tmp = intel_uncore_read(&dev_priv->uncore, CLKCFG);
> -
> - switch (tmp & CLKCFG_FSB_MASK) {
> - case CLKCFG_FSB_533:
> - dev_priv->fsb_freq = 533; /* 133*4 */
> - break;
> - case CLKCFG_FSB_800:
> - dev_priv->fsb_freq = 800; /* 200*4 */
> - break;
> - case CLKCFG_FSB_667:
> - dev_priv->fsb_freq = 667; /* 167*4 */
> - break;
> - case CLKCFG_FSB_400:
> - dev_priv->fsb_freq = 400; /* 100*4 */
> - break;
> - }
> -
> - switch (tmp & CLKCFG_MEM_MASK) {
> - case CLKCFG_MEM_533:
> - dev_priv->mem_freq = 533;
> - break;
> - case CLKCFG_MEM_667:
> - dev_priv->mem_freq = 667;
> - break;
> - case CLKCFG_MEM_800:
> - dev_priv->mem_freq = 800;
> - break;
> - }
> -
> - /* detect pineview DDR3 setting */
> - tmp = intel_uncore_read(&dev_priv->uncore, CSHRDDR3CTL);
> - dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
> -}
> -
> -static void ilk_get_mem_freq(struct drm_i915_private *dev_priv)
> -{
> - u16 ddrpll, csipll;
> -
> - ddrpll = intel_uncore_read16(&dev_priv->uncore, DDRMPLL1);
> - csipll = intel_uncore_read16(&dev_priv->uncore, CSIPLL0);
> -
> - switch (ddrpll & 0xff) {
> - case 0xc:
> - dev_priv->mem_freq = 800;
> - break;
> - case 0x10:
> - dev_priv->mem_freq = 1066;
> - break;
> - case 0x14:
> - dev_priv->mem_freq = 1333;
> - break;
> - case 0x18:
> - dev_priv->mem_freq = 1600;
> - break;
> - default:
> - drm_dbg(&dev_priv->drm, "unknown memory frequency 0x%02x\n",
> - ddrpll & 0xff);
> - dev_priv->mem_freq = 0;
> - break;
> - }
> -
> - switch (csipll & 0x3ff) {
> - case 0x00c:
> - dev_priv->fsb_freq = 3200;
> - break;
> - case 0x00e:
> - dev_priv->fsb_freq = 3733;
> - break;
> - case 0x010:
> - dev_priv->fsb_freq = 4266;
> - break;
> - case 0x012:
> - dev_priv->fsb_freq = 4800;
> - break;
> - case 0x014:
> - dev_priv->fsb_freq = 5333;
> - break;
> - case 0x016:
> - dev_priv->fsb_freq = 5866;
> - break;
> - case 0x018:
> - dev_priv->fsb_freq = 6400;
> - break;
> - default:
> - drm_dbg(&dev_priv->drm, "unknown fsb frequency 0x%04x\n",
> - csipll & 0x3ff);
> - dev_priv->fsb_freq = 0;
> - break;
> - }
> -}
> -
> static const struct cxsr_latency cxsr_latency_table[] = {
> {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
> {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
> @@ -4893,12 +4798,6 @@ void intel_init_pm(struct drm_i915_private *dev_priv)
> return;
> }
>
> - /* For cxsr */
> - if (IS_PINEVIEW(dev_priv))
> - pnv_get_mem_freq(dev_priv);
> - else if (GRAPHICS_VER(dev_priv) == 5)
> - ilk_get_mem_freq(dev_priv);
> -
> /* For FIFO watermark updates */
> if (HAS_PCH_SPLIT(dev_priv)) {
> ilk_setup_wm_latency(dev_priv);
> diff --git a/drivers/gpu/drm/i915/soc/intel_dram.c b/drivers/gpu/drm/i915/soc/intel_dram.c
> index bba8cb6e8ae4..9f0651d48d41 100644
> --- a/drivers/gpu/drm/i915/soc/intel_dram.c
> +++ b/drivers/gpu/drm/i915/soc/intel_dram.c
> @@ -10,6 +10,7 @@
> #include "intel_dram.h"
> #include "intel_mchbar_regs.h"
> #include "intel_pcode.h"
> +#include "vlv_sideband.h"
>
> struct dram_dimm_info {
> u16 size;
> @@ -42,6 +43,155 @@ static const char *intel_dram_type_str(enum intel_dram_type type)
>
> #undef DRAM_TYPE_STR
>
> +static void pnv_detect_mem_freq(struct drm_i915_private *dev_priv)
> +{
> + u32 tmp;
> +
> + tmp = intel_uncore_read(&dev_priv->uncore, CLKCFG);
> +
> + switch (tmp & CLKCFG_FSB_MASK) {
> + case CLKCFG_FSB_533:
> + dev_priv->fsb_freq = 533; /* 133*4 */
> + break;
> + case CLKCFG_FSB_800:
> + dev_priv->fsb_freq = 800; /* 200*4 */
> + break;
> + case CLKCFG_FSB_667:
> + dev_priv->fsb_freq = 667; /* 167*4 */
> + break;
> + case CLKCFG_FSB_400:
> + dev_priv->fsb_freq = 400; /* 100*4 */
> + break;
> + }
> +
> + switch (tmp & CLKCFG_MEM_MASK) {
> + case CLKCFG_MEM_533:
> + dev_priv->mem_freq = 533;
> + break;
> + case CLKCFG_MEM_667:
> + dev_priv->mem_freq = 667;
> + break;
> + case CLKCFG_MEM_800:
> + dev_priv->mem_freq = 800;
> + break;
> + }
> +
> + /* detect pineview DDR3 setting */
> + tmp = intel_uncore_read(&dev_priv->uncore, CSHRDDR3CTL);
> + dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
> +}
> +
> +static void ilk_detect_mem_freq(struct drm_i915_private *dev_priv)
> +{
> + u16 ddrpll, csipll;
> +
> + ddrpll = intel_uncore_read16(&dev_priv->uncore, DDRMPLL1);
> + switch (ddrpll & 0xff) {
> + case 0xc:
> + dev_priv->mem_freq = 800;
> + break;
> + case 0x10:
> + dev_priv->mem_freq = 1066;
> + break;
> + case 0x14:
> + dev_priv->mem_freq = 1333;
> + break;
> + case 0x18:
> + dev_priv->mem_freq = 1600;
> + break;
> + default:
> + drm_dbg(&dev_priv->drm, "unknown memory frequency 0x%02x\n",
> + ddrpll & 0xff);
> + dev_priv->mem_freq = 0;
> + break;
> + }
> +
> + csipll = intel_uncore_read16(&dev_priv->uncore, CSIPLL0);
> + switch (csipll & 0x3ff) {
> + case 0x00c:
> + dev_priv->fsb_freq = 3200;
> + break;
> + case 0x00e:
> + dev_priv->fsb_freq = 3733;
> + break;
> + case 0x010:
> + dev_priv->fsb_freq = 4266;
> + break;
> + case 0x012:
> + dev_priv->fsb_freq = 4800;
> + break;
> + case 0x014:
> + dev_priv->fsb_freq = 5333;
> + break;
> + case 0x016:
> + dev_priv->fsb_freq = 5866;
> + break;
> + case 0x018:
> + dev_priv->fsb_freq = 6400;
> + break;
> + default:
> + drm_dbg(&dev_priv->drm, "unknown fsb frequency 0x%04x\n",
> + csipll & 0x3ff);
> + dev_priv->fsb_freq = 0;
> + break;
> + }
> +}
> +
> +static void chv_detect_mem_freq(struct drm_i915_private *i915)
> +{
> + u32 val;
> +
> + vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_CCK));
> + val = vlv_cck_read(i915, CCK_FUSE_REG);
> + vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_CCK));
> +
> + switch ((val >> 2) & 0x7) {
> + case 3:
> + i915->mem_freq = 2000;
> + break;
> + default:
> + i915->mem_freq = 1600;
> + break;
> + }
> +}
> +
> +static void vlv_detect_mem_freq(struct drm_i915_private *i915)
> +{
> + u32 val;
> +
> + vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_PUNIT));
> + val = vlv_punit_read(i915, PUNIT_REG_GPU_FREQ_STS);
> + vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_PUNIT));
> +
> + switch ((val >> 6) & 3) {
> + case 0:
> + case 1:
> + i915->mem_freq = 800;
> + break;
> + case 2:
> + i915->mem_freq = 1066;
> + break;
> + case 3:
> + i915->mem_freq = 1333;
> + break;
> + }
> +}
> +
> +static void detect_mem_freq(struct drm_i915_private *i915)
> +{
> + if (IS_PINEVIEW(i915))
> + pnv_detect_mem_freq(i915);
> + else if (GRAPHICS_VER(i915) == 5)
> + ilk_detect_mem_freq(i915);
> + else if (IS_CHERRYVIEW(i915))
> + chv_detect_mem_freq(i915);
> + else if (IS_VALLEYVIEW(i915))
> + vlv_detect_mem_freq(i915);
> +
> + if (i915->mem_freq)
> + drm_dbg(&i915->drm, "DDR speed: %d MHz\n", i915->mem_freq);
> +}
> +
> static int intel_dimm_num_devices(const struct dram_dimm_info *dimm)
> {
> return dimm->ranks * 64 / (dimm->width ?: 1);
> @@ -507,6 +657,8 @@ void intel_dram_detect(struct drm_i915_private *i915)
> struct dram_info *dram_info = &i915->dram_info;
> int ret;
>
> + detect_mem_freq(i915);
> +
> if (GRAPHICS_VER(i915) < 9 || IS_DG2(i915) || !HAS_DISPLAY(i915))
> return;
>
> --
> 2.34.1
--
Ville Syrjälä
Intel
